PS The DS Cellos seem to have a problem with legato-trills... a bit a strange sound?
I worked too fast (about one hour with video). As well as William remarked, I should have used the performance trills.
Like all VSL's colletions, the DS takes time to fully exploit. The humanization tools (time and pitch) can achieve very good results faster, but less finely that when using dedicated tracks to each of the instrumentalists. Everyone has their own priorities and needs. For my part, I tried all sorts of combinations and I am impressed by the potential of the DS to add "dimension" (thickness, granularity, a less polished sound, imperfections, etc.) to other collections of VSL which remains nevertheless quite essential (a starting point as wrote William)
Claude